Allan M. Collins

Allan M. Collins (1936 to 2026) was an American cognitive scientist and Professor Emeritus of Learning Sciences at Northwestern University's School of Education and Social Policy. He is best known in psychology for foundational research on human semantic memory, carried out with M. R. Quillian and Elizabeth Loftus, which held that semantic knowledge is stored in category representations linked in a taxonomically organized hierarchy, a position supported by reaction-time experiments on question answering. In artificial intelligence he worked on intelligent tutoring systems and plausible reasoning, including the SCHOLAR system built with Jaime Carbonell and the Socratic tutoring system WHY. In education he moved toward a situated view of cognition, helped develop and study cognitive apprenticeship as an alternative to conventional practice, and was among the first to advocate design-based research methods. He held posts at BBN Technologies, Northwestern, Boston College and the Harvard Graduate School of Education, and died on April 20, 2026, aged 88.